ga‧ga /ˈɡɑːɡɑː/ adjective [not before noun] informal
[Date: 1900-2000; Language: French; Origin: gaga 'stupid person']

1. an insulting word used to describe someone who is confused because they are old:
Sid keeps forgetting my name. I think he’s going a bit gaga.

2. having a strong but often temporary feeling of love for someone Synonym : infatuated
gaga about/over
I can’t imagine why Susan is so gaga about him.

[TahlilGaran] Dictionary of Contemporary English ▲